HP-UX Reference (11i v1 00/12) - 1M System Administration Commands A-M (vol 3)

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arraymgr(1M) arraymgr(1M)

pattern ﬁll causes the disk array to ﬁll the unused portion of each block with a known

data pattern. This increases the amount of time required to perform each write, but it

ensures that any unused portions of the disk contain a recognizable data pattern. The

need to use this feature depends on how well your OS can detect unwritten portions of

the disk. If your OS requires a known format pattern to distinguish areas of the disk

that do not contain valid data, then enable write pattern ﬁll.

-F Force server lock. Used in multi-host conﬁgurations, this option allows a host to take

immediate ownership of the disk array lock. This lock gives the owner exclusive abil-

ity to perform destructive operations, such as reading and clearing the disk array logs.

-g { start | stop }

Starts and stops background disk integrity testing. When starting, the testing will

begin within 60 seconds of issuing the command. Disk integrity testing checks the con-

dition of the disk media, looking for potential problems and data errors.

-G value Controls the interval at which disk integrity testing is performed. A value of 1 to 365

speciﬁes the number of days between testing. If a value of 0 is speciﬁed, testing is dis-

abled and will not be performed. The default value is 9 days. If the disk array is reset

or power cycled, the default value of 9 days will be restored.

-h { on | off } Set Active Spare on or off. On enables the disk array to allocate enough capacity to

rebuild a failed disk. Off disables Active Spare.

-i { on | off } Set Auto Include on or off. On allows the disk array to automatically include any disk

when it is installed in the disk array cabinet. Off requires that a disk be manually

included after it is installed.

-J This option sets the level of protection offered by data resiliency. It determines how

often the content of the controller maps are copied to the disk. Keeping the map infor-

mation on the disks protect against controller map loss.

SingleController is used if the disk array is operating with only one controller.

This suppresses the single controller warning messages that are normally generated

when the disk array is operating with one controller.

Secure continually updates the disks with any changes in the controller maps. This

is the highest level of data protection, but it may result in decreased I/O performance.

Normal updates the maps on the disks at regular intervals (typically 4 seconds).

This option offers both data protection and good performance.

HighPerformance updates the disk maps only during shutdown of the disk array.

This is the lowest level of data protection, but it offers the highest level of perfor-

mance.

-l Flush current server logs to disk. The contents of the server log are copied to a disk

ﬁle.

-m { on | off } Set Terminator Power on or off.

-o { on | off } Set Secondary Controller Ofﬂine. When set on, this option causes the secondary con-

troller to remove itself from the SCSI bus. The secondary controller no longer

responds to host commands and appears to be disconnected from the SCSI bus. This

allows the secondary controller to be set to the same SCSI ID as the primary con-

troller. If the primary controller fails, the secondary controller takes over and the host

driver does not have to contend with a change in SCSI ID. This is useful for systems

that do not use a driver that can gracefully handle a change in SCSI ID on the disk

array.

-p { high | low }

Set Rebuild Priority high or low. High sets the rebuild to the same priority as host

I/Os. This allows the rebuild to complete as quickly as possible, but slows down the

servicing of I/Os. Low sets the rebuild priority lower than host I/Os. This ensures that

host I/Os are serviced more quickly, but it delays the completion of the rebuild.

-P { on | off } Set SCSI Parity Checking on or off.

-r { on | off } Set Disable Remote Reset on or off. On disables Remote Reset, and off enables it.

Remote Reset is useful when the disk array controllers are connected to separate

HP-UX Release 11i: December 2000 − 2 − Section 1M−−63

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